Place



v (No Model.) Jl K. CULLEN J SBE- LATHE, Y i 10.312,615. Patented Feb.24, 1885.

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UNITED STATES PATENT OFFICE.

JAMES K. CULLEN AND JAMES W. SEE, OF HAMILTON, OHIO, ASSIGNORS TO l THENILES TOOL WORKS, OF SAME-PLACE.

LATH E.

SPECIFICATION forming part of Letters Patent No. 312,615, datedrebrua'ry a4, 1885.

Application led Tune 18, 1;?84. (No model.)

To all whom it may concern.-

Be it known that we, JAMEs K. GULLEN and J AMEs W. SEE, both ofHamilton, Butler county, Ohio, have invented certain newr and usefulImprovements in Lathes, of which the following is a specification.

This invention pertains to metal-turning lathes; and it relatesparticularly to lathes intended for operating upon work not permittingconvenient driving by means of the usual dogs upon the ends of thepieces being turned. Railroad-car axles, for sufficient length of collarat the end to permit the use of a dog in case it is desired to turn bothjournals at once.

Car-axles have been turned by means of a driving-gear located midway ofthe length of the axle, the dog being placed at the midlength of theaxle. In such a lathe the axles have to be inserted endwise through thedriving-gear, and therefore such lathes were not adapted to operate uponcar-axles with the car-wheels secured to them. The central driving-gearsof such lathes have been slotted or gapped, and the axle has beeninserted sidewise through such gap and rigidly chucked in thedriving-gear and its hollow shaft; or thc axle has been supported on theusual centers.

Chucking the rough axle, so as to leave the wheel-flange at liberty tobe operated upon by turning-tools, is, in our opinion,entirelyimpracticable, and our experience tells us that to support anaxle on ordinary lathe-centers and rotate the same by a dog upon theaxle will not permit efficient work to be done upon the peripheries oflarge and hard car-wheels.

By means of our improvements in axlelathes axles with the wheels uponthem mayl be easily inserted in the lathe, the work driven by dogsengaging the car-wheels themselves at a point distant from the center,and the axle so rigidly supported as to permit of the heaviest cutsbeing taken.

Our invention will be readily understood from the following description,taken in connection with the accompanying drawings, in which Figure l isa front elevation, part section, of a lathe illustrating ourimprovements; Fig. 2, a vertical section through a head-stock upon theline a; Fig. 3, a vertical section ofl instance, do not have the centerstock upon the line b, and Figs. 4 and 5 face views of the driving-gearillustrating modifications. 4

In the drawings, A represents a lathe-bed; B, a pair of head-stocksoneupon each end of the bed; C, bearings in the head-stocks adapted toreceive the journals of the car-axle or other similar piece of work tobe turned; A

D, hand-screws-one in each head-stock-for adjusting the lathe-centers orthrust-bearings; E, the lathe-centers, fitting loosely within the screwsD, which are hollow; F, a spherical head upon the rear end of each oftbe centers D, seating in the end of the hollow of th'e adjListing-screw; G, a centerstock secured to the center of the lathe-bed;H, a tubular spindle journaled in the center stock; I, drivingplates,one secured to each endof the spindle H; J, drivers projecting from thefaces of the driving-plates, and engaging a dog upon the work beingturned, or ribs of the car-wheel,

or the like; K, a driving-gear secured to the center of the tubularspindle; L, a car-axle in operating position in the lathe; M, car-wheelsoccupying the usual position upon the caraxles; N, a radial gap in thegear K, for per-y mitting the car'axle or other similar piece to beplaced in proper position in the lathe, the gap extending through oneside of the drivingplates, and tubular spindle also; O, a gap in thebearing of the center stock, whereby free admission is provided to theinterior of the tubular spindle.

In turning car-wheels while upon their axles it is desirable that theaxles run upon the axlejournals, and not upon the usual lathe-centers.This supports the work more firmly, and also avoids eccentricity due tountrue centers in the axles. The head-stock bearings C are arranged toopen and receive the axle, as clearly shown in Fig. 2. The lathe-centersfurnish the thrust-bearings for the axle while being turned, and, beingfree within their adjustingscrews, are at liberty to accommodatethemselves to any eccentricity of the centers in the axles. rIhe latheis to be fitted with the usual toolcarriages and feeding devices.

S represents th-e usual driving-pinion, and V its shaft, which givesmotion to the gear K.

In order that the gap N shall not interfere with the driving of thegear, a second pinion,

T, actuated through an idler, U, may be employed, one pinion driving thegear while the gap is passing the other pinion; or the gap may beprovided with a removable patch, l?, as illustrated in Fig. 4; or thegap may be patched by alamina of the gear, as illustrated at Q in Fig.5, the lamina having a gap Which maybe brought into correspondence withthe gap N when it is desired that the gap be open.

Compensating drivers may be combined with the driver-plates, and thedrivers at each end of the tubular spindle may be itted with mechanismto equalize them with reference to each other.

A description of the last-mentioned feature is reserved as the possiblesubject for a future patent.

We make no broad claim to supporting the J AMES K. CULLEN. JAMES WV.SEE. Y

Vitnesses:

GEORGE gT. Rnrss, XVM. S. GIFFEN.

